Gamma t (5 Ergebnisse)

Hardcover. Zustand: Wie neu. 1. Auflage. Als der Künstler Alberto Giacometti während des zweiten Weltkriegs nach einer Reise in die Schweiz nicht nach Paris zurückkehren kann, hütet sein Bruder Diego allein das gemeinsame Atelier. 24 Illustrationen von Mónica Naranjo Uribe. 56 Seiten, 17.5 x 24 cm, 500 g. …

Couverture rigide. Zustand: Bon. [24] pp. Paris, G. Gavoret et Cie, 1925, in-8, [24] pp, Broché, agrafes anglaises, étiquette de titre illustrée en bleu contrecollée au premier plat, Joli catalogue illustré en noir : poste, coffret, malLette et accessoires T.S.F. Cachet ex-libris à la page de titre de Radio-Sud, Marseille, L. Berjouan. Légères taches et plis.…

(London, 1910). No wrappers. In: "The London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science", (Sixth Series), September 1910. Pp. 385-544 a. 6 folded plates. (Entire Sept.-issue offered). Bragg's paper: pp. 385-416. First printing of the paper in which Bragg discloses the corpuscular nature of Gamma- and X-Rays."Considering gamma and X rays to be of the same nature, he declared the evidence in favor of the ether pulse theory to be "overrated," and emphasized that theory was unable to account for the large quantity of energy and momentum that remained in the ray regardless of the distance from its source, and that could all be delivered to a single electron. During the following five years Bragg backed off somewhat from this concrete model of the gamma ray, emphasizing its "corpuscular" rather than its "material" nature. but did not abandon the general concept of an electron-with-its-charge-neutralized until after the discovery of X-ray diffraction in 1912. Thus, initially without being aware of the views of Einstein and Stark, Bragg became the first, and remained the foremost, English-language advocate of a view of X rays that stressed their "quantal" properties. (DSB).…

(Paris, Gauthier-Villars, 1900). 4to. No wrappers. In: "Comptes Rendus Hebdomadaires des Séances de L'Academie des Sciences", Tome 130, No 15 a. No 18. Pp. (962-) 1044 a. pp. (1145-) 1220. Entire issues offered. Stamp on first pages. A few tears to margins. Poor paperquality, fragile. Villard's papers: pp. 1010-1012 a. 1178-1182, textillustrations. First apperance of Villard's two papers in which he announced and described the discovery of a new type of radiation more powerfull and penetrating than alpha-and beta rays. The new type of rays was named by Rutherford as gammarays."His (Villard)experiments in radioactivity led to the unexpected discovery of gamma rays in 1900. Villard recognized them as being different from x rays because the gamma rays had a much greater penetrating depth. He had discovered they were emitted from radioactive substances and were not affected by electric or magnetic fields. These came to be called gamma rays by another scientist, Ernest Rutherford. It wasn't until 1914 that Rutherford showed that they were a form of electromagnetic (EM) like light only with a much shorter wavelength than x rays. Now we know that gamma rays are a form of EM radiation similar to x rays. Gamma rays tend to have a higher energy and a shorter wavelength than x rays do. However, the dividing line between these two forms of radiation is not clearly defined. Scientists typically apply the term gamma ray to EM radiation with energies above several hundred thousand electron volts." (Hps - Healt Physics Society). - See Sigmund Brandt "The Harevst of a Century", Episode 6, p. 24 ff.).The issues contains other importent papers HENRI BECQUEREL "Note sur la transmission du rayonnement du radium au travers des corps", pp. 979-984 and "Sur la transparance de l'aluminium pour le rayonnement du radium", pp. 1154-57. P. CURIE et G. SAGNAC "Électrisation négative des rayons secondaires produits au moyen des rayons de Röntgen", pp. 1013-1016.…

(Paris, Gauthier-Villars, 1900). 4to. No wrappers. In: "Comptes Rendus Hebdomadaires des Séances de L'Academie des Sciences", Tome 130, No 15 a. No 18. Pp. (962-) 1044 a. pp. (1145-) 1220. Entire issues offered. Villard's papers: pp. 1010-1012 a. 1178-1182, textillustrations. Clean and fine. First apperance of Villard's two papers in which he announced and described the discovery of a new type of radiation more powerfull and penetrating than alpha-and beta rays. The new type of rays was named by Rutherford as gammarays.…